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     <a href="WS58a04a822e3e50102bd615109794195ff-7d39.html"><b>Validating signatures</b></a> 
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                        <h1>Validate a timestamp certificate</h1>
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                        <p>
                           If a signature
displays the date and time, that time is the local time on the signer’s computer.
However, a second date and time may appear in the Signature Properties
dialog box, indicating that the signer uses a timestamp server.
To validate a signature that contains a timestamp, you must obtain
the certificate for the timestamp server and add it to your list
of trusted identities. Otherwise, the timestamp appears in the Signatures
panel as unverified, and you must validate the timestamp manually. </p>

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<ol><li><span>Click the Signatures button&#160;<img src="images/A_NavBarSign_Lg_N.png" /> in
the navigation pane, select the signature, and choose Validate Signature
from the Options menu. </span></li>
<li><span>Click the Signature Properties button in the Signature
Validation Status dialog box.</span></li>
<li><span>In the Signature Properties dialog box, click the Date/Time
tab to view the timestamp authority, and then click the Show Certificate
button. (This button appears in the Date/Time tab only if the signer
used a timestamp server.)</span></li>
<li><span>In the Certificate Viewer, click the Trust tab to determine
if the timestamp certificate is trusted. If it isn’t trusted, click
Add To Trusted Identities. If a certificate for the timestamp server
isn’t listed, request one from the signer.</span></li>
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